Hey, Instead of typing "BITCOIN" you have written "BITCION" so it doesn't seems like a typing mistake. 
Your uncle's advice is correct and you are at right place to learn about cryptos. Please checkout this post to have some ideas about forum's guidelines to follow: https://bitcointalk.org/index.php?topic=1689727.0
A few additions to your points:
1. Since you are thinking of holding for long term the wallet should be non-custodial because you never know a custodial wallet may discontinue their service of may put some mandatory requirement like KYC with passport only, and your funds will be blocked. SO always use non-custodial wallets. If you are planning to invest and hold big amount its worth to consider hardware wallet. Hardware wallets are the most secure method to store your crypto funds. --> here is the list of hardware wallets
2. Bear market is best time to enter in the market. since halving is coming so this period may be the right time to take entry.
3. Trading is risky that correct but some trading strategies are safe. For example you can buy in the bear market and sell in bull market as per targets set by you. Then again take entry in bear market.
Your uncle's advice is correct and you are at right place to learn about cryptos. Please checkout this post to have some ideas about forum's guidelines to follow: https://bitcointalk.org/index.php?topic=1689727.0
A few additions to your points:
1. Since you are thinking of holding for long term the wallet should be non-custodial because you never know a custodial wallet may discontinue their service of may put some mandatory requirement like KYC with passport only, and your funds will be blocked. SO always use non-custodial wallets. If you are planning to invest and hold big amount its worth to consider hardware wallet. Hardware wallets are the most secure method to store your crypto funds. --> here is the list of hardware wallets
2. Bear market is best time to enter in the market. since halving is coming so this period may be the right time to take entry.
3. Trading is risky that correct but some trading strategies are safe. For example you can buy in the bear market and sell in bull market as per targets set by you. Then again take entry in bear market.